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One thing that I noticed. If cu3 gate from $q[2]$ to $q[0]$ is some $U$, then the cu3 from $q[2]$ to $q[0]$ should be $U^2$ in the phase estimation algorithm, but the comparisons of operators with the help of numpy.array showed me that it's not true here. I tried to implement by replacing cu3 part of the QASM code with the following: cu3(1.6, -1.12, 2.03) q[...


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The QFT is wrong, you can check it. And I have a question, what are the matrix parameters in the controlled unitary in the figure 4(in the article) quantum circuit implementation for the 4×4 matrix?


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